waila.lua

   1 local hud_item_name = ""
   2
   3
   4 local hud_bg = minetest.localplayer:hud_add({
   5                                 hud_elem_type = "image", -- see HUD element types, default "text"
   6                                 position = {x=0.5, y=0},
   7                                 name = "",    -- default ""
   8                                 scale = {x=2.25, y=2.25}, -- default {x=0,y=0}
   9                                 text = "waila.png",    -- default ""
  10                                 offset = { x = 0, y = 29.25},
  11                                 z_index = 0,
  12                         })
  13
  14 local hud_name = minetest.localplayer:hud_add({
  15                 name = "hud_name",
  16                 position = {x=0.5,y=0},
  17                 hud_elem_type = "text",
  18                 number = 0xFFFFFF,
  19                 alignment = 0,
  20                 offset = { x = 0, y = 17},
  21                 text = "",
  22                 z_index = 1,
  23         })
  24 local hud_node = minetest.localplayer:hud_add({
  25                 name = "hud_node",
  26                 position = {x=0.5,y=0},
  27                 hud_elem_type = "text",
  28                 number = 0xFFFFFF,
  29                 alignment = 0,
  30                 offset = { x = 0, y = 36},
  31                 text = "",
  32                 z_index = 1,
  33         })
  34
  35
  36 local function update()
  37         if minetest.camera then
  38                 local pos = minetest.camera:get_pos()
  39                 local pos2 = vector.add(pos,vector.multiply(minetest.camera:get_look_dir(), 4))
  40                 local ray = minetest.raycast(pos, pos2, false, false)
  41
  42                 local pointed_thing = ray:next()
  43                 if pointed_thing and pointed_thing.under then
  44                         local node = minetest.get_node_or_nil(pointed_thing.under).name
  45                         if hud_item_name ~= node then
  46                                 local def = minetest.get_item_def(node)
  47                                 minetest.localplayer:hud_change(hud_name, "text", def.description)
  48                                 minetest.localplayer:hud_change(hud_node, "text", node)
  49                                 minetest.localplayer:hud_change(hud_bg,   "text", "waila.png")
  50                                 hud_item_name = node
  51                         end
  52                 else
  53                         --make hud invisible
  54                         minetest.localplayer:hud_change(hud_name, "text", "")
  55                         minetest.localplayer:hud_change(hud_node, "text", "")
  56                         minetest.localplayer:hud_change(hud_bg,   "text", "")
  57                         hud_item_name = ""
  58                 end
  59         end
  60         minetest.after(0.01, function()
  61                 update()
  62         end)
  63 end
  64
  65 update()